Effect of Manganese Ions on the Structure of Ca(OH)2 and Mercury Adsorption Performance of Mnx+/Ca(OH)2 Composites

被引：43

作者：

Wang, Yunjun ^{[1
,2
]}

Duan, Yufeng ^{[1
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Nanjing 210096, Peoples R China

[2] Shanxi Elect Power Explorat & Design Inst, Taiyuan 030001, Peoples R China

来源：

ENERGY & FUELS | 2011年 / 25卷 / 04期

关键词：

PHASE ELEMENTAL MERCURY; ACTIVATED CARBON; FLUE-GAS; FLY ASHES; COAL; OXIDATION; REMOVAL; CHLORINE; SORBENTS; CAPTURE;

D O I：

10.1021/ef200113t

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The adsorption abilities for vapor-phase Hg-0 by a Ca-based sorbent were investigated in an attempt to produce more effective sorbents for the control of elemental mercury emission. Ca(OH)(2) and Mnx+ doped in Ca(OH)(2) have been characterized by surface analytical methods, such as Brunauer-Emmett-Teller (BET) surf ice area, scanning electron micrographs (SEMs), energy-dispersive X-ray (EDX) microanalysis, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The mercury adsorption characteristic was also revealed by XPS. The results showed that mercury removal by Mnx+/Ca(OH)2 was a bit higher than that by Ca(OH)(2). From mercury speciation measurement, Hg-0 could be oxidized by MnO2 effectively. From XPS analysis, there was a peak corresponding to the divalent mercury. Thus, there was oxidized mercury on the surface of Mnx+/Ca(OH)(2). The presence of MnO2 affected mercury speciation.

引用

页码：1553 / 1558

页数：6

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